package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @Author 王子旭
 * @Date 2025/03/23 22:27
 * @Version 1.0
 */
public class RefreshTokenInterceptor implements HandlerInterceptor {

    private StringRedisTemplate redisTemplate;

    public RefreshTokenInterceptor(StringRedisTemplate redisTemplate) {
        this.redisTemplate = redisTemplate;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 1.获取请求头中的token
//        HttpSession session = request.getSession();
        String token = request.getHeader("authorization");
        if (StrUtil.isBlank(token)) {
            return true;
        }
        // 2.基于token获取redis中的用户
//        Object user = session.getAttribute("user");
        Map<Object, Object> userMap = redisTemplate.opsForHash()
                .entries(RedisConstants.LOGIN_USER_KEY + token);
        // 3.判断用户是否存在
        if (userMap.isEmpty()) {
            return true;
        }
        // 5.将查询到的数据转换为UserDTO对象
        UserDTO user = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
        UserHolder.saveUser(user);
        // 7.刷新token有效期
        redisTemplate.expire(RedisConstants.LOGIN_USER_KEY + token,30, TimeUnit.DAYS);
        // 8.放行
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        // 移除用户
        UserHolder.removeUser();
    }
}
